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lavfi/overlay: improve feedback in case of invalid expression 

Based on vf_hue.c code.
This commit is contained in:
Stefano Sabatini 2013-04-12 00:06:52 +02:00
parent fdedfc029b
commit 9da369604e
1 changed files with 9 additions and 8 deletions
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17
libavfilter/vf_overlay.c
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@ -167,7 +167,7 @@ static void eval_expr(AVFilterContext *ctx, enum EvalTarget eval_tgt)
}
}
static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
{
int ret;
AVExpr *old = NULL;
@ -178,7 +178,8 @@ static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
NULL, NULL, NULL, NULL, 0, log_ctx);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s'\n", expr);
"Error when evaluating the expression '%s' for %s\n",
expr, option);
*pexpr = old;
return ret;
}
@ -194,11 +195,11 @@ static int process_command(AVFilterContext *ctx, const char *cmd, const char *ar
int ret;
if (!strcmp(cmd, "x"))
ret = set_expr(&over->x_pexpr, args, ctx);
ret = set_expr(&over->x_pexpr, args, cmd, ctx);
else if (!strcmp(cmd, "y"))
ret = set_expr(&over->y_pexpr, args, ctx);
ret = set_expr(&over->y_pexpr, args, cmd, ctx);
else if (!strcmp(cmd, "enable"))
ret = set_expr(&over->enable_pexpr, args, ctx);
ret = set_expr(&over->enable_pexpr, args, cmd, ctx);
else
ret = AVERROR(ENOSYS);
@ -318,9 +319,9 @@ static int config_input_overlay(AVFilterLink *inlink)
over->var_values[VAR_T] = NAN;
over->var_values[VAR_POS] = NAN;
if ((ret = set_expr(&over->x_pexpr, over->x_expr, ctx)) < 0 ||
(ret = set_expr(&over->y_pexpr, over->y_expr, ctx)) < 0 ||
(ret = set_expr(&over->enable_pexpr, over->enable_expr, ctx)) < 0)
if ((ret = set_expr(&over->x_pexpr, over->x_expr, "x", ctx)) < 0 ||
(ret = set_expr(&over->y_pexpr, over->y_expr, "y", ctx)) < 0 ||
(ret = set_expr(&over->enable_pexpr, over->enable_expr, "enable", ctx)) < 0)
return ret;
over->overlay_is_packed_rgb =